Seat Mii 2020 Owner's Manual page 187

from discharging. For example, if the ignition is
kept on for a long time with the engine stop-
ped or if the parking or side light is left on for
a long time.
The 12-volt battery discharges
if electrical consumers are used while the
●
drive system is switched off.
WARNING
Incorrectly installing the 12-volt battery or
using an inappropriate 12-volt battery can
cause short circuits, fires and severe inju-
ries.
Maintenance-free and leak-protected
●
12-volt batteries must always be used, and
they must have the same characteristics,
specifications and dimensions as the fac-
tory-fitted 12-volt battery.
WARNING
A highly explosive gas mixture is generated
during the charging process of the 12-volt
battery.
Only charge the 12-volt battery in a well-
●
ventilated place.
Never charge a frozen or thawed 12-volt
●
battery. A discharged 12 volt battery may
freeze at a temperature of just 0 °C (+32
°F).
Any 12-volt battery that has frozen must
●
be replaced.
Verification and replacement
Incorrectly connected connection cables
●
can cause a short circuit. First connect the
positive cable and then the negative one.
CAUTION
Never connect power supply accessories,
such as solar panels or battery chargers, to
the 12-volt socket or cigarette lighter to
charge the 12-volt battery. This could dam-
age the vehicle's electrical system.
For the sake of the environment
12-volt batteries contain toxic substan-
●
ces such as sulphuric acid and lead. The 12
volt battery must be disposed of in accord-
ance with current regulations.
Electrolyte can contaminate the environ-
●
ment. Used vehicle fluids must be collected
and disposed of properly.
Troubleshooting

The indicator lamp lights up red and
this text message is displayed: 12 volt
power supply interrupted.
Stop the vehicle! The vehicle should be

stopped as soon as it is possible and safe to
do so. The 12-volt battery does not charge
while driving.
Disconnect any unnecessary electrical
●
consumers.
Go to a qualified establishment to get the
●
system checked.
The following text message is displayed:
Error: 12 volt power system.
The connection between the on-board net-
work and the 12-volt battery has been inter-
rupted. If the drive system switches off in this
situation, it should not be switched on again
and the vehicle should be jump started
›››
page 45 or professional assistance should
be sought.
Go to a qualified establishment to get the
●
system checked.
The following text message is displayed:
Error: Switching off the 12 volt
battery.
The 12-volt battery supervision system does
not work.
Go to a qualified establishment to get the
●
system checked.
The following text message is displayed:
Error: 12-volt battery: Workshop.
The 12 volt vehicle battery has almost
reached the end of its useful life.
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